HESI A2 Anatomy & Physiology V1&V2 Part B 2024. 175 Questions And Answers

HESI A2 Anatomy & Physiology V1&V2
Part B 2024
single nucleus, branched striated muscle fibers and join at the intercalated disc. ANS: How would you
define Cardiac muscles?

single nucleus, branched striated muscle fibers and join at the intercalated disc.

Striated, multinucleated, & cylindrical fibers

spindle-shaped, nonstriated, and have a single nucleus



Striated, multinucleated, & cylindrical fibers ANS: How would you describe skeletal muscles?

single nucleus, branched striated muscle fibers and join at the intercalated disc.

Striated, multinucleated, & cylindrical fibers

spindle-shaped, nonstriated, and have a single nucleus



spindle-shaped, nonstriated, and have a single nucleus ANS: How would you describe smooth muscle?

single nucleus, branched striated muscle fibers and join at the intercalated disc.

Striated, multinucleated, & cylindrical fibers

spindle-shaped, nonstriated, and have a single nucleus



The intestine ANS: Which of the following contains nonstriated muscle fibers?

A. Pectoralis major

B. The Heart

C. The intestine

D. Quad. muscle



Extensors ANS: Which group of muscles increases the angle at a joint?

Flexors

,Pronators

Extensors

Abductors



Flexors ANS: Which group of muscles decrease the angle at a joint?

extensors

flexors

pronators

abductors



Abductors ANS: which group of muscles pull the limb away from the midline?

Adduction

inversion

abduction

flexion



Myosin ANS: Which of the following cleaves (Split) ATP to generate energy for muscle contraction?

ACTIN

MYOSIN

TROPOMYOSIN

TROPONIN



sarcoplasmic reticulum ANS: What releases calcium molecules in muscle contraction?



Troponin, actin ANS: Calcium binds to_______, which leads to the active site of_________ being
exposed

,A. actin, myosin

B. troponin, actin

C. myosin, tropomyosin

D. troponin, actin



Actin ANS: The myosin head full of energy from cleaved ATP binds to______ and forms cross bridges

A. myosin

B. actin

C. tropomyosin

D. troponin



Calcium binds to troponin and leads to the uncovering of the active site of actin ANS: What is the role of
calcium in muscle contraction?

*Calcium binds to tropomyosin and leads to the uncovering of the active site of actin

*Calcium binds to actin and leads to the uncovering site of myosin

*Calcium binds to troponin and leads to the uncovering of the site actin

*Calcium binds to troponin and leads to the uncovering site of myosin



Actin ANS: Contraction occurs because of cross bridges between myosin and?_____



The dermis ANS: The layer of skin that contains a high number of blood vessels, as well as elastic and
collagen fibers is the ____________.



Langerhan cells ANS: Which of the following is not found in the dermis?

Nerves

Sensory receptors

, Langerhan cells

Sebaceous gland



Hypothalamus ANS: Which structure in the nervous system works together with the endocrine system?

Cerebral cortex

Hypothalamus

Pons

Medulla oblongata



Afferent (Sensory) neurons ANS: nerve fibers responsible for bringing sensory information from the
outside world into the brain.

Efferent

Afferent

Motor

Somatic



One cell body, many dendrites, and one axon ANS: A neuron has

One cell body, one dendrite, and one axon

One cell body, many dendrites, and one axon

Many cell bodies, one dendrite, and one axon

One cell body, one dendrite, and many axons



Sarcomere ANS: fundamental unit of contraction and is defined as the region between two Z-lines.

Myofibril

Sarcomere

Sarcoplasmic reticulum