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WorksheetsCell Biology + Histology Quiz
Total questions: 71
Worksheet time: 36mins
Which organelle is responsible for protein synthesis?
Golgi apparatus
Ribosomes
Lysosomes
Peroxisomes
What is the main function of the mitochondria?
Lipid synthesis
Energy production via ATP synthesis
Protein degradation
Cellular signaling
What is the main structural component of the plasma membrane?
Proteins
Carbohydrates
Phospholipids
Nucleic acids
Which phase of the cell cycle involves DNA replication?
G1 phase
G2 phase
S phase
M phase
What type of cell division produces genetically identical daughter cells?
Meiosis
Mitosis
Binary fission
Cytokinesis
What is the main function of microvilli on epithelial cells?
Secretion
Transport and absorption
Movement of substances
Protection against abrasion
Which type of epithelial tissue lines blood vessels and alveoli?
Stratified squamous epithelium
Simple cuboidal epithelium
Simple squamous epithelium
Pseudostratified columnar epithelium
What type of epithelial cell is associated with sensory reception?
Microvilli
Stereocilia
Cilia
Keratinized cells
Which is the most abundant protein in the body, found in connective tissues?
Elastin
Collagen
Keratin
Fibrin
Which type of connective tissue cell is responsible for producing antibodies?
Macrophages
Plasma cells
Fibroblasts
Mast cells
Which type of connective tissue fiber provides elasticity?
Collagen fibers
Reticular fibers
Elastic fibers
Myofibrils
What is the function of osteoblasts?
Break down bone matrix
Form and secrete bone matrix
Maintain bone homeostasis
Store minerals
Which type of bone cell is involved in bone resorption?
Osteoblasts
Osteocytes
Osteoclasts
Osteoprogenitor cells
Which type of ossification forms flat bones?
Endochondral ossification
Primary ossification
Secondary ossification
Intramembranous ossification
What is the inorganic component of the bone matrix primarily made of?
Type I collagen
Proteoglycans
Hydroxyapatite crystals
Elastic fibers
What covers the outer surface of bones and contains osteogenic cells?
Endosteum
Periosteum
Marrow cavity
Cartilage
What is the primary function of hemoglobin in erythrocytes?
ATP production
Oxygen and carbon dioxide transport
Immune response
Blood clotting
Which type of leukocyte is most abundant and functions in phagocytosis?
Eosinophils
Neutrophils
Basophils
Monocytes
What triggers platelets to form a plug at the site of vascular injury?
Release of von Willebrand factor (vWF)
Activation of lymphocytes
Secretion of hemoglobin
Increase in red blood cell count
What is the lifespan of an erythrocyte?
10 days
30 days
60 days
120 days
Which cells differentiate into plasma cells to produce antibodies?
Neutrophils
B lymphocytes
T lymphocytes
Monocytes
What is the primary function of brown adipose tissue?
Mechanical protection
Energy storage
Temperature regulation
Hormone production
Which of the following hormones influences fat storage in adipocytes?
Insulin
Thyroxine
Cortisol
Glucagon
Which type of adipocyte contains a single large lipid droplet?
Multilocular adipocyte
Brown adipocyte
White adipocyte
Mesenchymal cell
What is the origin of adipocytes?
Fibroblasts
Mesenchymal stem cells
Hematopoietic stem cells
Osteoblasts
In which population is brown adipose tissue most prevalent?
Adults around the abdomen
Children with high energy needs
Newborns requiring temperature regulation
Athletes with increased muscle mass
What is the main fiber type found in hyaline cartilage?
Type I collagen
Type II collagen
Elastic fibers
Reticular fibers
What is the function of the perichondrium?
Store minerals
Nourish cartilage and facilitate growth
Provide flexibility to cartilage
Maintain tensile strength
Which type of cartilage is found in intervertebral discs?
Hyaline cartilage
Elastic cartilage
Fibrocartilage
Articular cartilage
Which characteristic distinguishes elastic cartilage from hyaline cartilage?
Contains elastic fibers
Contains more chondrocytes
Is avascular
Found in articular surfaces
Which type of cartilage growth occurs by adding layers on the surface?
Interstitial growth
Appositional growth
Endochondral growth
Intramembranous growth
What is the functional unit of skeletal muscle contraction?
Myofibril
Sarcomere
T-tubule
Myofilament
Which type of muscle tissue is striated and involuntary?
Skeletal muscle
Smooth muscle
Cardiac muscle
None of the above
Which protein blocks the binding sites on actin in relaxed muscle?
Troponin
Tropomyosin
Myosin
Actin
What triggers the release of calcium from the sarcoplasmic reticulum during muscle contraction?
Depolarization of the sarcolemma
Action of ATP
Movement of myosin
Repolarization of the membrane
Which of the following describes smooth muscle?
Multinucleated, striated
Uninucleated, non-striated
Multinucleated, non-striated
Uninucleated, striated
What is the main function of dendrites in a neuron?
Transmit impulses away from the cell body
Receive impulses and transmit them to the cell body
Store neurotransmitters
Generate action potentials
Which type of glial cell forms the myelin sheath in the central nervous system (CNS)?
Astrocytes
Schwann cells
Oligodendrocytes
Microglia
What type of synapse uses neurotransmitters to relay signals?
Electrical synapse
Chemical synapse
Gap junction
Desmosome
What is the role of the sodium-potassium pump during the resting potential of a neuron?
Pump Na+ into the cell and K+ out
Pump Na+ out of the cell and K+ in
Prevent the movement of ions
Depolarize the membrane
Which layer of the heart wall is made of cardiac muscle?
Endocardium
Myocardium
Epicardium
Pericardium
Which vessels carry oxygenated blood from the heart to the body?
Veins
Capillaries
Arteries
Lymphatic vessels
What is the primary function of capillaries in the circulatory system?
Pump blood
Exchange substances between blood and tissues
Store blood
Transport lymph
Which type of capillaries have pores in their walls?
Continuous
Fenestrated
Sinusoids
Elastic
Which type of capillaries have pores in their walls?
Continuous
Fenestrated
Sinusoids
Elastic
What is the main function of the lymphatic system?
Transport oxygen
Collect excess interstitial fluid and return it to the cardiovascular system
Transport hormones
Regulate blood pressure
What is the primary function of alveoli in the lungs?
Humidify air
Exchange oxygen and carbon dioxide
Filter dust particles
Protect against infections
Which type of epithelial cell secretes surfactant in the alveoli?
Type I pneumocyte
Type II pneumocyte
Goblet cell
Ciliated columnar cell
Which structure prevents food from entering the respiratory tract during swallowing?
Trachea
Larynx
Epiglottis
Pharynx
What is the function of Clara cells in bronchioles?
Exchange gases
Secrete surfactant proteins and detoxify substances
Provide structural support
Produce mucus
Which part of the respiratory system is lined by pseudostratified columnar epithelium with cilia?
Alveoli
Trachea
Bronchioles
Pleura
What is the resting membrane potential of a neuron?
-50 mV
-60 mV
-70 mV
-80 mV
What maintains the resting membrane potential in neurons?
Calcium channels
Sodium-potassium pumps
Voltage-gated sodium channels
Chloride ion transporters
What happens during hyperpolarization in neurons?
Sodium ions enter the cell
Potassium ions exit the cell
Membrane potential becomes more positive
Membrane potential becomes more negative
Which structure in neurons speeds up the conduction of action potentials?
Axon hillock
Dendrites
Myelin sheath
Synaptic cleft
What type of conduction occurs in myelinated axons?
Continuous conduction
Saltatory conduction
Slow conduction
Refractory conduction
Which glial cell type forms the blood-brain barrier?
Microglia
Astrocytes
Oligodendrocytes
Schwann cells
What is the primary function of microglia in the CNS?
Form myelin
Phagocytosis of debris
Provide structural support
Facilitate neurotransmitter release
Where are ependymocytes found in the nervous system?
Around axons
In ventricles of the brain
In peripheral ganglia
Surrounding dendrites
What is the role of satellite cells in the PNS?
Form myelin sheaths
Support neuronal cell bodies
Phagocytose cellular debris
Transmit impulses
What is the role of the pulmonary surfactant secreted by Type II pneumocytes?
Increase oxygen absorption
Reduce surface tension in alveoli
Protect alveoli from pathogens
Remove carbon dioxide
Which organ contains the vocal cords?
Pharynx
Larynx
Trachea
Bronchus
What prevents the trachea from collapsing?
Smooth muscle
Elastic fibers
Hyaline cartilage rings
Dense connective tissue
What is the primary function of alveolar macrophages?
Secrete pulmonary surfactant
Phagocytose dust and debris in alveoli
Maintain the pleural cavity
Transport oxygen to capillaries
Which type of blood vessel has the thickest tunica media?
Arteries
Veins
Capillaries
Lymphatic vessels
What is the main structural feature of fenestrated capillaries?
Complete endothelial lining
Tight junctions
Pores in the endothelial walls
Perforations in the basement membrane
Which phase of the cardiac cycle involves ventricular contraction?
Systole
Diastole
Resting phase
Recovery phase
Which part of the heart pumps oxygenated blood to the body?
Left atrium
Right atrium
Left ventricle
Right ventricle
What is the role of the lymph nodes in the lymphatic system?
Pump lymph throughout the body
Filter lymph and activate immune responses
Remove carbon dioxide from blood
Store oxygen
Which type of cartilage forms the epiglottis?
Hyaline cartilage
Elastic cartilage
Fibrocartilage
Articular cartilage
What type of epithelial cells line the trachea?
Simple squamous epithelium
Simple cuboidal epithelium
Pseudostratified columnar epithelium with cilia
Stratified squamous epithelium
