Question 1

Which muscle is primarily responsible for flexion of the forearm at the elbow joint?

Accepted Answer

Brachialis

Question 2

A patient presents with difficulty abducting their arm. Which nerve is most likely damaged?

Accepted Answer

Axillary nerve

Question 3

Which cranial nerve passes through the cribriform foramina and is responsible for the sense of smell?

Accepted Answer

Olfactory nerve (I)

Question 4

During a sheep brain dissection, you identify the arbor vitae. What is its primary function?

Accepted Answer

Coordinates motor movements

Question 5

Which muscle forms the bulk of the calf and is involved in plantar flexion of the foot?

Accepted Answer

Gastrocnemius

Question 6

A lesion in the dorsal root of the spinal cord would most likely result in which deficit?

Accepted Answer

Loss of sensory function

Question 7

Which equation best represents the resting membrane potential of a neuron, considering the relative permeability of sodium and potassium ions?

Accepted Answer

$$ V_{m} = \frac{RT}{F} \ln \left( \frac{P_{K^+}[K^+]_{out} + P_{Na^+}[Na^+]_{out}}{P_{K^+}[K^+]_{in} + P_{Na^+}[Na^+]_{in}} \right) $$

Question 8

Which structure in the eye is responsible for focusing light onto the retina?

Accepted Answer

Lens

Question 9

A patient has lost the ability to taste on the anterior two-thirds of their tongue. Which cranial nerve is most likely affected?

Accepted Answer

Facial nerve (VII)

Question 10

Which muscle is part of the rotator cuff and is responsible for lateral rotation of the humerus?

Accepted Answer

Infraspinatus

Question 11

Which equation describes the force generated by a skeletal muscle as a function of muscle length?

Accepted Answer

$$ F = F_{max} \cdot \left(1 - \left| \frac{L - L_{opt}}{L_{opt}} \right| \right) $$

Question 12

Which structure in the ear is directly responsible for converting mechanical vibrations into electrical signals?

Accepted Answer

Hair cells in the cochlea

Question 13

A patient is unable to move their tongue properly. Which cranial nerve is most likely damaged?

Accepted Answer

Hypoglossal nerve (XII)

Question 14

Which muscle is responsible for compressing the cheeks during chewing?

Accepted Answer

Buccinator

Question 15

Which nerve innervates the quadriceps femoris and sartorius muscles?

Accepted Answer

Femoral nerve

Question 16

Which structure connects the two cerebral hemispheres and allows communication between them?

Accepted Answer

Corpus callosum

Question 17

Which muscle is the primary flexor of the thigh at the hip joint?

Accepted Answer

Iliopsoas

Question 18

Which equation best represents the relationship between stimulus intensity and action potential frequency in a neuron?

Accepted Answer

$$ f = f_{max} \cdot \left( \frac{I}{I_{threshold}} \right) $$

Question 19

Which cranial nerve is responsible for hearing and equilibrium?

Accepted Answer

Vestibulocochlear nerve (VIII)

BIO107 Lab Practicum 2 Study Guide: Muscular, Nervous, and Special Senses Systems

Study Guide - Practice Questions