Question 1

Which event initiates muscle fiber contraction at the neuromuscular junction?

Accepted Answer

Release of acetylcholine from the motor neuron into the synaptic cleft

Question 2

During the cross-bridge cycle, what causes the myosin head to detach from actin, leading to muscle relaxation?

Accepted Answer

Binding of ATP to the myosin head

Question 3

Which of the following is a ligand-gated ion channel?

Accepted Answer

Nicotinic acetylcholine receptor

Question 4

Which statement best distinguishes graded potentials from action potentials?

Accepted Answer

Graded potentials decrease in amplitude with distance, while action potentials do not

Question 5

What is the correct sequence for the generation and propagation of an action potential?

Accepted Answer

Depolarization, repolarization, hyperpolarization, return to resting potential

Question 6

Which lobe of the cerebral cortex is primarily responsible for processing visual information?

Accepted Answer

Occipital lobe

Question 7

What is the main function of the cerebellum?

Accepted Answer

Coordination of voluntary movements and balance

Question 8

Which structure provides a protective barrier that regulates the passage of substances from the blood into the CNS?

Accepted Answer

Blood-brain barrier

Question 9

Which of the following best describes the gross structure of the spinal cord?

Accepted Answer

Central gray matter surrounded by white matter

Question 10

Which cranial nerve is responsible for vision?

Accepted Answer

Optic nerve (II)

Question 11

Which component of a reflex arc is responsible for transmitting the response to the effector?

Accepted Answer

Motor neuron

Question 12

Which division of the autonomic nervous system is responsible for 'fight or flight' responses?

Accepted Answer

Sympathetic division

Question 13

Which neurotransmitter is released by cholinergic fibers?

Accepted Answer

Acetylcholine

Question 14

What effect does the sympathetic division have on the heart?

Accepted Answer

Increases heart rate

Question 15

Which process is involved in the transduction of taste for salty foods?

Accepted Answer

Direct entry of Na$$^+$$ ions through ion channels

Question 16

Which structure is responsible for focusing light onto the retina?

Accepted Answer

Lens

Question 17

Which condition is characterized by increased intraocular pressure and can lead to vision loss?

Accepted Answer

Glaucoma

Question 18

Which photoreceptor is primarily responsible for scotopic (dark) vision?

Accepted Answer

Rods

Question 19

What is the pathway for sound conduction from the external ear to the internal ear?

Accepted Answer

External auditory canal → tympanic membrane → ossicles → oval window → cochlea

Question 20

Which balance organ detects rotational movements of the head?

Accepted Answer

Semicircular canals

ANP College Course Study Guide: Muscle, Nervous, and Sensory Systems

Study Guide - Practice Questions