$$F = n \times f_{single}$$, where $$n is $$the number of cross-bridges and $$f_{single} is $$the force per cross-bridge

Question 1

Which of the following is NOT a primary function of the skeletal system?

Accepted Answer

Production of hormones

Question 2

A patient presents with a fracture in the diaphysis of the femur. Which part of the long bone is affected?

Accepted Answer

The shaft of the bone

Question 3

Which type of bone cell is primarily responsible for bone resorption?

Accepted Answer

Osteoclast

Question 4

During childhood, which process allows bones to increase in length?

Accepted Answer

Endochondral ossification at the epiphyseal plate

Question 5

Which equation best represents the relationship between calcium homeostasis and bone remodeling?

Accepted Answer

$$Ca^{2+}$$_{blood} = $$Ca^{2+}$$_{released\ by\ osteoclasts} - $$Ca^{2+}$$_{deposited\ by\ osteoblasts}$$

Question 6

Which of the following bones is part of the axial skeleton?

Accepted Answer

Sternum

Question 7

A patient with osteoporosis is at increased risk for fractures because:

Accepted Answer

Bone density is decreased due to increased osteoclast activity

Question 8

Which joint type allows for the greatest range of motion?

Accepted Answer

Ball-and-socket joint

Question 9

Which structure is responsible for producing blood cells in adults?

Accepted Answer

Red bone marrow

Question 10

Which equation correctly describes the force generated by a muscle contraction according to the sliding filament theory?

Accepted Answer

$$F = n 	imes f_{single}$$, where $$n is $$the number of cross-bridges and $$f_{single} is $$the force per cross-bridge

Question 11

Which muscle tissue type is involuntary and found in the walls of hollow organs?

Accepted Answer

Smooth muscle

Question 12

A patient is unable to flex their elbow after an injury. Which muscle group is most likely affected?

Accepted Answer

Biceps brachii

Question 13

Which of the following best describes the role of the neuromuscular junction?

Accepted Answer

It transmits the action potential from a motor neuron to a muscle fiber

Question 14

Which equation represents the Nernst equation for calculating membrane potential?

Accepted Answer

$$E = \frac{RT}{zF} \ln \left( \frac{[ion]_{out}}{[ion]_{in}} \right)$$

Question 15

Which muscle is primarily responsible for inspiration during breathing?

Accepted Answer

Diaphragm

Question 16

Which of the following is a property unique to cardiac muscle tissue?

Accepted Answer

Intercalated discs for synchronized contraction

Question 17

Which muscle group is responsible for extending the knee?

Accepted Answer

Quadriceps group

Question 18

Which of the following best describes the difference between origin and insertion of a muscle?

Accepted Answer

Origin is the fixed attachment, while insertion moves during contraction

Question 19

Which muscle is involved in mastication (chewing)?

Accepted Answer

Masseter

Question 20

A patient has difficulty smiling and frowning. Which muscle group is most likely affected?

Accepted Answer

Muscles of facial expression

Skeletal & Muscular System: Comprehensive Study Notes

Guida di studio - Domande di pratica