A&P quizes for exam 3

what portion of the eye is the highly reflective area in the caudal, interior aspect of the globe?

tapetum lucidum

To which layer of the eye does the tapetum lucidum belong in?

middle vascular

what is the name of the extra-ocular structure that is located between the eyelids at the medial canthus? the gland associated with this structure is called a cherry eye when it is prolapsed

the nictitating membrane

list the 3 layers of the eye and a structure that belongs to each layer:

outer fibrous - sclera

middle vascular- iris

inner nervous- retina

The _________ is the receptor organ of hearing within the cochlea and these structures reside in the _____ ear.

organ of corti

inner

The structures associated with hearing are housed in which bone?

Temporal

Describe the flow of tears from the production to the drainage from the eye.

Tears are transported through the lacrimal system. They are formed at the lacrimal gland and travel down and out of the eye.

True or False: Elevations in hormone levels in the systemic. circulation will negatively feedback on the hypothalamus and pituitary gland and result in an overall increase in plasma hormone levels

False

True or False: The hypothalamus communicates with the posterior pituitary gland via a small system of capillaries called a portal system.

False. communicates with the anterior pituitary gland.

The hormone ______ is released from the ____ and results in follicular ovulation

LH

anterior pituitary gland

Which hormone listed has the overall effect to lower glucose levels?

thyroxine

glucagon

insulin

cortisol

insulin

where is insulin produced in the body?

pancreas

Which below is not a hormone produced by the adrenal gland?

glucocorticoids

calcitonin

aldosterone

calcitonin is produced in the thryoid

which hormone below is not stored by the posterior pituitary gland?

antidiuretic hormone

adrenocorticotropic hormone

oxytocin

adrenocorticotropic hormone

Using the thyroid gland as an example, explain the process of negative feedback

increase of thyroid hormone in circulation from the thyroid gland will decrease the TRH hypothalamus (releasing factor), lowering TSH the anterior pituitary gland and lowering T4 production from the thyroid gland.

What activity of teh heart is a result in the “lub” sound heard on auscultation?

Mitral and Tricuspid valve closing

The _______ is the pacemaker of the heart.

SA node

Which blood vessel type is the location of gas exchange?

Capillaries

True or False: the pulse rate and the heart rate are always the same.

False

The “QRS” complex on and EKG corresponds to which part of the cardiac cycle?

Ventricular depolarization

Describe the path of blood flow through the heart.

vena cave→ right atrium→ tricuspid valve → right ventricle→pulmonary valve→pulmonary artery→lungs→pulmonary vein→left atrium→mitral valve → left ventricle→ aortic valve→aorta