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BIO 169 Exam 1 (Answered) 125 Questions and Correct Answers, 100%. 2024/2025.
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BIO 169 Exam 1 (Answered) 125Questions and Correct Answers, 100%.
2024/2025.
Does the endocrine system work slow or fast?
Slow but lasts longer
Which system does the endocrine system work with?
Nervous system
What are functions of the endocrine system?
regulates metabolism, digestion, reproduction
Free hormones act on their target tissues immediately after being delivered from the blood. True or
False
True
Exocrine secretes glands through ducts true or false
true
Where does endocrine release?
Blood stream
What links the nervous system to the endocrine system?
hypothalamus
What are hormones?
Chemical messengers that control the growth, differentiation, and metabolism of specific target cells
What is autocrine?
Local regulator acts on the cell that released it (a note to remind yourself) common in cancer cells
Paracrine?
Referring to a secreted molecule that acts on a neighboring cell.
Steroid hormones are synthesized by
cholesterol
True or false: Hormones only have an affect on target cell.
, true
What are water soluble hormones?
bind to receptors outside of plasma membrane. Work through second messengers. CANNOT ENTER
DIRECTLY. MUST GO THROUGH RECEPTOR
What are lipid soluble hormones?
have receptors inside of cell which bind inside of cell.
G proteins turn ATP into
cAMP
What happens when something binds to a protein?
shape is changed therefore the job of protein is changed.
Calcium acts as which messenger?
Second messenger
Do steroid and thyroid hormones need secondary messengers?
No, they diffuse directly into target cells
mRNA makes ______
protein
Are specific receptors necessary? If so, why?
Yes bc When you have a receptor that receptor is only gonna be able to "see" a certain type of hormone.
If there is no receptor, that cell is not going to be affected.
What does thyroid hormone make us produce more of?
ATP
What is down regulate?
a cell starts to get overwhelmed and decrease the number of receptors to lower number of signals.
What is up regulate?
when cells up the number of signals.
Endocrine glands will be stimulated by_________
other hormones or neural stimuli
What is considered master gland?
Pituitary
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