WorksheetsPhysiology Remedials
Total questions: 31
Worksheet time: 10mins
1. Calcium is critically important for initiating the contraction of skeletal muscle, cardiac muscle, and smooth muscle. Skeletal muscle and cardiac muscle contract when calcium binds to which structure or molecule?
a. Actin
b. Myosin head
c. Tropomyosin
d. Troponin
What is physiology?
a. The study of the human organism and its physical mechanism
b. The study of chemical and physical components of the body
c. The study of biology and its morphology
d. The study of physical and chemical mechanisms responsible for the origin, development, and progression of life
Which of the following is a consequence of myelination in large nerve fibers?
a. Decreased velocity of nerve impulses
b. Generation of action potentials only at the nodes of Ranvier
c. Increased energy requirement to maintain ion gradients
d. Increased diffusion of ions across the axon membrane
All other factors being equal, axons with smaller diameters conduct action potentials at a higher velocity than do axons with larger diameters.
a. True
b. False
c. Maybe
d. I do't know
Depolarization is the term used to describe the movement of __________ ions to the inside of a neuron while repolarization is the term used to describe the movement of __________ ions to the outside of a neuron.
a. sodium; calcium
b. sodium; potassium
c. potassium; sodium
d. calcium; potassium
The largest percentage of molecules that make up the cell membrane are
a. carbohydrates, nucleic acids, and proteins
b. carbohydrates, water, and nucleic acids
c. phospholipids, cholesterol, and proteins
d. nucleic acids, amino acids, and fatty acids
Which of these locations has the ability to break down ATP, which releases energy?
a. globular actin molecule
b. head of myosin molecule
c. troponin molecule
d. tropomyosin molecule
For cross bridge release, it is necessary for __________ to attach to the myosin head.
a. trpomyosin molecul
b. ATP
c. Ca2+ ions
d. troponin molecule
What is the primary protein responsible for oxygen transport in the blood?
a. albumin
b. globulin
c. hemoglobin
d. fibrinogen
Which part of the neuron is involved in sending an impulse to the synapse area?
a. axon
b. soma
c. dendrite
d. myelin sheath
A single contraction of skeletal muscle is most likely to be terminated by which of the following actions?
a. Closure of the postsynaptic acetylcholine receptor
a. Removal of acetylcholine from the neuromuscular junction
c. Removal of Ca from the terminal of the motor neuron
d. removal of sarcoplasmic Ca
The sequence of travel by an action potential through the heart is...
a. sinoatrial node, atrioventricular node, atrioventricular bundle, bundle branches, Purkinje fibers.
b. atrioventricular node, sinoatrial node, atrioventricular bundle, bundle branches, Purkinje fibers.
c. atrioventricular bundle, atrioventricular node, sinoatrial node, bundle branches, Purkinje fibers.
d. Purkinje fibers, atrioventricular bundle, atrioventricular node, sinoatrial node, bundle branches.
1. Which of the following structures will have the slowest rate of conduction of the cardiac action potential?
a. atrial muscle
b. AV nodes
c. purkinje fibers
d. ventricular muscle
1. Which of the following phases of the cardiac cycle follows immediately after the beginning of the QRS wave?
a. Isovolumic relaxation
b. Atrial systole
c. Diastasis
d. Isovolumic contraction
The Haldane effect describes:
a. The increased affinity of hemoglobin for oxygen at higher pH
b. The decreased affinity of hemoglobin for oxygen at lower pH.
c. The effect of oxygenation on carbon dioxide transport
d. The effect of carbon dioxide on oxygen transport.
What is the primary form in which carbon dioxide (CO2) is transported in the blood?
a. Dissolved CO2
b. Carbaminohemoglobin
c. (HCO3-)
d. (H2CO3)
1. Contraction of the diaphragm causes which action to take place?
a. peristalsis
b. inspiration
c. expiration
d. yawning
Breathing in and then exhaling as much air as possible demonstrates
a. vital capacity
b. total lung capacity
c. inspiratory reserve volume (IRV)
d. expiratory reserve volume (ERV)
External respiration refers to
a. pulmonary ventilation
b. ventilation and gas exchange the air and blood
c. ventilation, gas exchange, and gas transport by the blood
d. everything except cellular respiration
Humans breathe more rapidly during exercise than before because during exercise the blood contains
a. an increased level of oxygen
b. a decreased number of red blood cells
c. an increased level of carbon dioxide
d. a decreased amount of hemoglobin
What is the main function of external respiration?
a. Dissociation of CO2 into carbonic acid occurring in internal respiration.
b. Transport of CO2 in plasma as ions for delivery to body tissues.
c. Exchange of O2 and CO2 to oxygenate blood flowing in lungs.
d. Exchange of O2 and CO2 for energy in systemic tissues and cells.
What is the process of gas exchange between the alveoli of the lungs and blood in pulmonary capillaries called?
a. Pulmonary ventilation
b. Internal respiration
a. Cellular respiration
c. External respiration
Which of the following is NOT a function of the respiratory zone?
a. Filtering, warming, and moistening air
b. Exchange of gases between the alveoli of the lungs and blood in pulmonary capillaries
c. Conduction of air into the lungs
d. Gas exchange between air and blood
The conducting zone of the respiratory system performs all of the following functions, except
a. warming the inspired air
b. exchanging gases with the blood
c. cleaning the inspired air
d. humidifying the inspired air
1. In addition to regulating renal excretion, what other functions do the kidneys perform?
a. Regulation of body fluid osmolality and electrolyte concentrations
b. Secretion, metabolism, and excretion of hormones
c. Regulation of arterial pressure
d. All of the above
Most of the reabsorbed water in the kidney is reabsorbed across the walls of the:
a. Loop of Henle
b. Distal tubules
c. Collecting ducts
d. Proximal tubule
Which of the following is a primary goal of respiration?
a. To provide oxygen to the tissues and remove carbon dioxide
b. To regulate blood pressure
c. To produce ATP
d. To remove waste products from the body
What is the process of inhalation and exhalation of air called?
a. Internal respiration
b. Pulmonary ventilation
c. External respiration
d. Cellular respiration
Of the four chambers of the heart, which has the thickest wall?
a. Right atrium
b. Left atrium
c. Right ventricle
d. Left ventricle
QRS waves
a. ventricular muscle fibers begin to relax
b. relaxation of the atria
c. initiates contraction of the ventricles
d. none of the above
Which of these locations has the ability to break down ATP, which releases energy?
a. globular actin molecule
b. head of myosin molecule
c. troponin molecule
d. tropomyosin molecule
