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WorksheetsBIOL1307 Exam 4 Review Quiros
Total questions: 66
Worksheet time: 33mins
What is the primary purpose of the human musculoskeletal system?
To protect the internal organs and facilitate movement
To generate energy and circulate nutrients
To regulate body temperature and digestion
To maintain immune defense and hormone production
What is a key characteristic of a hydrostatic skeleton?
It consists of hard, mineralized structures located within soft tissues.
It is a skeleton formed by a fluid-filled compartment that resists external compression.
It is an external skeleton that provides defense and supports movement.
It is a rigid structure that protects internal organs and facilitates locomotion.
Which of the following animals typically have a hydrostatic skeleton?
Crabs and insects
Horses and humans
Sea anemones and earthworms
Birds and reptiles
What is an example of an organism with an exoskeleton?
Sponge
Crab
Frog
Snake
What are the primary functions of an endoskeleton?
Protect internal organs, resist external pressure, and regulate nutrient flow
Provide body support, protect internal organs, and facilitate movement through muscle attachment
Allow gliding movements, contract fluid-filled compartments, and create resistance
Form rigid encasements, generate body heat, and allow for fluid flow
Which of the following animals has an endoskeleton?
Insects
Earthworms
Horses
Starfish
Which of the following is an example of a flat bone?
Femur
Sternum
Vertebra
Patella
What is a characteristic of long bones?
Cube-shaped with equal length and width
Thin, broad, and provide extensive protection or muscle attachment
Contain a central shaft and rounded ends, often filled with bone marrow
Complex shapes with notched or ridged surfaces
Which of the following is an example of an irregular bone?
Humerus
Tarsals
Vertebra
Clavicle
Sesamoid bones are typically:
Found in the skull and protect the brain
Flat and broad for muscle attachment
Small, flat, and embedded within tendons near joints
Long with a central shaft and red marrow
Which bone type is shaped like a sesame seed and commonly found in joints?
Long bones
Short bones
Sesamoid bones
Flat bones
What is a distinguishing feature of short bones?
They are thin and provide surfaces for muscle attachment.
They are cube-shaped with nearly equal length and width.
They have a shaft and are longer than they are wide.
They form joints with great mobility, like the shoulder blade.
Which of the following is an example of a long bone?
Patella
Femur
Sternum
Vertebra
Which type of bone is found in the wrist and ankle?
Short bones
Flat bones
Sesamoid bones
Irregular bones
What is the main function of flat bones like the sternum?
Weight-bearing and facilitating movement
Protecting organs and providing surfaces for muscle attachment
Supporting body weight and storing bone marrow
Increasing range of motion at joints
The patella is classified as which type of bone?
Irregular bone
Short bone
Long bone
Sesamoid bone
What is the primary difference in function between the axial skeleton and the appendicular skeleton, as shown in Figures 38.5 and 38.10?
The axial skeleton provides protection for vital organs and supports the body's central structure, while the appendicular skeleton facilitates movement and includes the limbs.
The axial skeleton stores minerals and produces blood cells, while the appendicular skeleton protects the brain and spinal cord.
The axial skeleton consists of only cartilage, while the appendicular skeleton consists of only bones.
The axial skeleton is responsible for locomotion, while the appendicular skeleton supports and stabilizes the body's trunk.
What bone forms the pectoral girdle in the anterior of the upper limbs?
Scapula
Clavicle
Sternum
Humerus
Which of the following bones is NOT part of the upper limb?
Radius
Humerus
Femur
Ulna
What is the function of the scapula in the pectoral girdle?
It articulates with the sternum to form the chest.
It supports muscles crossing the shoulder joint and provides a large surface for muscle attachment.
It serves as a weight-bearing bone for the upper limbs.
It forms a hinge joint for wrist movement.
Which bone is the longest and strongest in the lower limb?
Tibia
Fibula
Femur
Patella
What is the primary function of the pelvic girdle?
To facilitate wrist movement
To bear the weight of the body and provide attachment points for the lower limbs
To protect the spinal cord and brain
To support the arms and allow shoulder rotation
Which bone in the lower limb does NOT bear weight but serves as a site for muscle attachment?
Tibia
Femur
Patella
Femur
What bones make up the pelvic girdle?
Ilium, scapula, and clavicle
Ilium, ischium, and pubis
Femur, tibia, and fibula
Humerus, radius, and ulna
Which of the following bones articulates with the humerus at the elbow?
Scapula and clavicle
Radius and ulna
Tibia and fibula
Carpals and metacarpals
Which bone is triangular, located in the anterior of the knee joint, and improves knee extension?
Tibia
Femur
Patella
Fibula
What differentiates the structure of the female pelvis from the male pelvis?
The female pelvis is lighter and thinner, with a broad arch and a pelvic canal adapted for childbearing.
The female pelvis is thicker and heavier to bear more weight.
The female pelvis contains extra joints to allow greater mobility.
The female pelvis is shorter and narrower than the male pelvis.
What is the process of endochondral ossification?
The formation of bones from fibrous membranes
The replacement of hyaline cartilage with bone tissue
The conversion of tendons into bone structures
The fusion of existing bones to form larger bones
During endochondral ossification, what is the role of the growth plate (epiphyseal plate)?
To form fibrous membranes for flat bones
To persist as cartilage throughout life
To facilitate the lengthwise growth of long bones until adolescence
To create mineralized bone tissue at birth
Which synovial joint allows for rotational movement, such as turning your head?
Hinge joint
Pivot joint
Ball-and-socket joint
Saddle joint
What type of synovial joint provides the greatest range of motion, allowing movement in all directions?
Ball-and-socket joint
Condyloid joint
Planar joint
Saddle joint
Which synovial joint allows for gliding movements with limited range of motion?
Planar joint
Hinge joint
Pivot joint
Condyloid joint
Which joint type resembles a rider on a saddle and allows angular movement with greater range of motion?
Condyloid joint
Saddle joint
Ball-and-socket joint
Hinge joint
Which muscle type is striated, voluntary, and responsible for locomotion?
Skeletal muscle
Cardiac muscle
Smooth muscle
Myocardial muscle
What differentiates cardiac muscle from skeletal muscle?
Cardiac muscle is voluntary and located in the respiratory tract.
Cardiac muscle is striated, involuntary, and contains intercalated disks.
Cardiac muscle is unstriated and consciously controlled.
Cardiac muscle is multinucleated and found in hollow organs.
Where is smooth muscle typically found, and what is its control mechanism?
Attached to bones; voluntary control
In the heart; involuntary control
In hollow organs; involuntary control
In the skeletal system; conscious control
What is the sarcolemma in skeletal muscle fibers?
The site of ATP production in mitochondria
The plasma membrane responsible for conducting action potentials
The protein filament responsible for contraction
The structure that stores calcium ions
What are the repeating units of myofilaments in skeletal muscle fibers called?
Myofibrils
Sarcomeres
Actin fibers
Z-discs
What initiates the sliding filament model of contraction?
The release of calcium ions binding to troponin
ATP attaching to actin filaments
The fusion of Z-lines with myosin
During the power stroke in muscle contraction, what happens?
ATP binds to myosin, detaching it from actin.
Myosin heads pivot and pull actin filaments toward the M-line.
Calcium ions are released from the sarcoplasmic reticulum.
Actin filaments shorten, causing muscle contraction.
What role does ATP play in muscle contraction?
It blocks the binding sites on actin.
It binds to myosin to release the cross-bridge and reset the myosin head.
It forms the cross-bridge between actin and myosin.
It directly shortens actin filaments for contraction.
Which respiratory system relies on direct diffusion for gas exchange?
Gills
Tracheal system
Skin
Flatworms
What is the key characteristic of gills in aquatic organisms?
They must be kept moist for diffusion.
They consist of spiracles and small tubes.
They are thin, highly branched, and provide a large surface area for gas exchange.
They directly transport oxygen without circulatory involvement.
Which respiratory system uses spiracles and tubular networks for gas exchange?
Tracheal system
Skin respiration
Gills
Mammalian system
What structure connects the nasal cavity to the trachea and ensures air is funneled to the lungs?
Pharynx
Larynx
Bronchi
Alveoli
What is the role of cartilage in the trachea?
To increase the diameter for airflow
To provide strength and keep the airway open
To allow for contraction during inspiration
To regulate oxygen diffusion
How does gas exchange occur inside the alveoli?
Oxygen and carbon dioxide move through active transport.
Oxygen diffuses into the blood, and carbon dioxide diffuses into the alveoli due to partial pressure differences.
Oxygen is absorbed by alveolar sacs, and carbon dioxide is expelled by red blood cells.
Blood actively pumps oxygen into the alveoli while absorbing carbon dioxide.
What distinguishes bird respiration from amphibian respiration?
Amphibians use lungs only, while birds use gills.
Birds have air sacs and unidirectional airflow, making gas exchange more efficient.
Amphibians rely entirely on their skin, while birds have primitive lungs.
Birds use tidal flow like mammals, while amphibians have a one-directional system.
What happens during inhalation in mammals?
The diaphragm and intercostal muscles relax, decreasing thoracic cavity volume.
Pressure in the thoracic cavity increases, forcing air into the lungs.
The diaphragm contracts, increasing thoracic cavity volume and decreasing pressure.
Air moves passively into the lungs due to elastic recoil.
How does Boyle’s Law explain the mechanics of breathing?
Gas exchange is driven by concentration gradients.
Pressure decreases when thoracic cavity volume increases, allowing air to enter the lungs.
Oxygen and carbon dioxide diffuse due to partial pressure differences.
The lungs expand as pressure increases in the surrounding tissues.
What percentage of oxygen is transported in the blood bound to hemoglobin?
10%
50%
75%
98.5%
How is most carbon dioxide transported in the blood?
Bound to hemoglobin
Dissolved in plasma
As bicarbonate ions in the blood plasma
Directly within red blood cells
Why is carbon monoxide (CO) dangerous for animals?
It reduces lung volume, making breathing difficult.
It preferentially binds to hemoglobin over oxygen, reducing oxygen transport.
It increases carbon dioxide levels, causing hyperventilation.
It dissolves in plasma, altering blood pH rapidly.
What is the treatment for carbon monoxide poisoning?
Administering oxygen at normal atmospheric levels
Increasing carbon dioxide levels in the blood
Administering 100% oxygen to displace carbon monoxide from hemoglobin
Cooling the patient to reduce metabolic rates
What are the primary functions of the circulatory system?
Transporting oxygen, nutrients, and waste products; regulating temperature; and protecting against pathogens
Generating energy for cells, storing fat, and producing blood cells
Transporting digestive enzymes and absorbing nutrients directly into cells
What is the main difference between open and closed circulatory systems?
Open systems mix blood with interstitial fluid, while closed systems circulate blood within vessels.
Open systems use oxygen, while closed systems do not.
Closed systems pump blood without a heart, while open systems rely on the heart.
Closed systems transport hemolymph, while open systems transport blood.
Which type of circulatory system do fish possess?
No circulatory system, relying on diffusion
Single circuit with a two-chambered heart
Double circuit with a three-chambered heart
Double circuit with a four-chambered heart
What makes the circulatory system of birds and mammals efficient for oxygen delivery?
Three-chambered heart with mixed oxygenated and deoxygenated blood
A single circuit for blood flow with a two-chambered heart
A four-chambered heart that completely separates oxygenated and deoxygenated blood
A partially divided ventricle that reduces mixing
Which chamber of the mammalian heart receives deoxygenated blood from the body?
Left atrium
Left ventricle
Right atrium
Right ventricle
What is the correct sequence of blood flow through the heart?
Left atrium → left ventricle → pulmonary arteries → lungs → right atrium → right ventricle → aorta
Right atrium → right ventricle → pulmonary arteries → lungs → left atrium → left ventricle → aorta
Why is the left side of the mammalian heart thicker than the right?
It pumps blood to the lungs, which require high pressure.
It pumps blood to the entire body, requiring greater force.
It pumps blood to the brain, which demands constant oxygen.
It pumps blood to the heart itself for nourishment.
What happens during systole?
The heart relaxes and fills with blood.
The heart contracts and pumps blood out.
The ventricles relax while the atria contract.
The atrioventricular valves open to allow blood flow.
Which structure initiates the heartbeat by generating electrical signals?
Atrioventricular (AV) node
Sinoatrial (SA) node
Purkinje fibers
Bundle of His
What role do Purkinje fibers play in the cardiac conduction system?
They pause the electrical signal to allow atrial contraction.
They spread the signal from the apex of the heart to the ventricular myocardium.
They initiate electrical signals in the atria.
They conduct electrical signals between the atria and ventricles.
What does the QRS complex represent in an electrocardiogram?
Atrial depolarization
Atrial repolarization
Ventricular depolarization
Ventricular repolarization
What is a major difference between veins and arteries?
Veins carry oxygen-rich blood, while arteries carry oxygen-poor blood.
Arteries have thicker walls and carry blood away from the heart, while veins have thinner walls and return blood to the heart.
Veins are under higher pressure than arteries.
Arteries contain valves to prevent backflow, while veins do not.
