Explore BrainMass

Human Anatomy and Physiology


(a) Define plexus. (b) Indicate the spinal roots of origin of the four major nerve plexuses, and name the general body regions served by each.

Nervous system

A man in his early 70s was having problems chewing his food. He was asked to stick out his tongue. It deviated to the right, and its right side was quite wasted. What cranial nerve was impaired? Bob a couch potato likes to eat a very large meal in the evening. After the meal, his wife asks him to help clean the dishes, bu

Fiber tracts

Describe the functional problems that would be experienced by a person in which these fiber tracts have been cut: (a) lateral spinothalamic, (b) anterior and posterior spinocerebellar, (c) tectospinal

Spinal Cord and Roots

Describe the spinal cord, depicting its extent, its composition of gray and white matter, and its spinal roots.

Brain hemisphere functions

(a) Name the hemisphere involved with most people's ability to draw. (b) Provide the major function of each: primary motor cortex, premotor cortex, somatosensory association area, primary sensory area, visual and auditory areas, prefrontal cortex, Wernicke's and Broca's areas

Cerebrum: grooves/hemispheres/lobes

(a) What is the advantage of having a cerebrum that is highly convoluted? (b) What term is used to indicate its grooves? Its outward folds? (c) What groove divides the cerebrum into two hemispheres? (d) What divides the parietal from the frontal lobe? The parietal from the temporal lobe?

Polarized membrane state

What is the polarized membrane state? How is it maintained? (Note the relative roles of both passive and active mechanisms.)

Cell Body/Axons and Dendrites

(a) Describe the composition and function of the cell body. (b) How are axons and dendrites alike? In what ways (structurally and functionally) do they differ?


1) What is responsible for the banding pattern seen in skeletal muscle cells? 2)What is the functions of tendons? How is a tendon different from an aponeurosis? How is it similar? 3)How do isotonic and isometric contractions different ? 4) The sternocleidomastoid muscles help to flex the neck. What are their antagonist

Muscular system

Name three muscles or, muscle groups used as sites for intramuscular injections. Which is most often used in babies? Tom was advised by his doctor to lose weight and start jogging. He began to jog daily. On the sixth day, he was forced to jump out of the way of a speeding car. He heard a snapping sound that was immediatel

Muscular system

Detailed not needed, just verifying choice 1. Which of the following does NOT compress the abdomen ______________. latissimus dorsi rectus abdominis external oblique transversus abdominis internal oblique 2. Paralysis of which of the following would make an individual unabl

Skeletal Muscle Fiber

True or false: Most muscles contain a predominance of one skeletal muscle fiber type. Explain the reasoning behind your choice.

Muscle groups

Name two muscles in each of the following compartments or regions: (a) thenar eminence (ball of thumb), (b) posterior compartment of forearm, (c) anterior compartment of forearm?deep muscle group, (d) anterior muscle group in the arm, (e) muscles of mastication, (f) third muscle layer of the foot, (g) posterior compartment of le

Shoulder joint movements

List all (six) possible movements that can occur at the shoulder joint and name the prime mover(s) of each movement. Then name their antagonists.

Abdominal muscles

(a) Name the four muscle pairs that act in unison to compress the abdominal contents. (b) How does their arrangement (fiber direction) contribute to the strength of the abdominal wall? (c) Which of these muscles can effect lateral rotation of the spine? (d) Which can act alone to flex the spine?

Smooth muscle properties

Smooth muscle has some unique properties, such as low energy usage, ability to maintain contraction over long periods, and the stress-relaxation response. Tie these properties to the function of smooth muscle in the body.

Muscle fatigue

Describe the cause(s) of muscle fatigue and define this term clearly

Sacromere and sliding filament theory

(a) Describe the structure of a sarcomere and indicate the relationship of the sarcomere to the myofilament. (b) Explain the sliding filament theory of contraction inlcuding a relaxed and a contracted sarcomere

An Analysis of Skeletal System Conditions

Please discuss the following: 1) After having a severe cold accompanied by nasal congestion, one complained of a frontal headache and the right side of his face ached. What bony structures probably became infected by the bacteria or viruses causing the cold? 2) An elderly woman, stumbled while walking, she then felt a te

Thigh and leg bone

What is the anatomic name given to the bone that covers over the articulation between the thigh and the leg, and to what special bone group does this bone belong?

Sinuous curve

The clavicle can be palpated through its entire length and is said to follow a sinuous curve. What is meant by sinuous curve?