Answer:
False
Explanation:
G-Protein Coupled Receptors (GPCR):
GPCRs are transmembrane receptors with three components:
- Extracellular domain for ligand binding
- Seven transmembrane helices
- Intracellular G-protein binding domain
Transmission Through GPCRs:
- A ligand binds to the extracellular domain of the GPCR.
- The GPCR undergoes conformational changes.
- This conformational change activates the G-protein by replacing its bound GDP (guanosine diphosphate) with GTP (guanosine triphosphate).
- The G-protein then loses its GTP bound alpha subunit which activates the adenylyl cyclase system.
Answer:
C. A Chi-square analysis cannot determine linkage
Answer:
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Answer:
The correct answer would be - the potassium ions continue to move out of the axon.
Explanation:
During transmission of the impulse when sodium channels are closed and potassium channels are open, the cell membrane of the axon cell becomes hyperpolarized due to the continuous movement of the potassium ion to outside the axon. During this refractory period, the impulse can not be fire or generated.
Thus, the correct answer would be - the potassium ions continue to move out of the axon.
Complete question:
___BLANK___ system contains glands that secrete hormones into the bloodstream, whereas the ___BLANCK__system secretes substances through ducts.
Answer:
The ENDOCRINE system contains glands that secrete hormones into the bloodstream, whereas the EXOCRINE system secretes substances through ducts.
Explanation:
Those tissues that produce hormones might be classified as:
- endocrine glands (produce hormones exclusively),
- exocrine glands (produce hormones and other secretions),
- non-glandular tissues that secrete hormones but are not glands.
- Endocrine organs, also known as ductless glands or endocrine glands, release their secretion directly to the bloodstream. Blood transport hormones to target cells, tissues, and organs, where they stimulate a change in metabolic activities
- Exocrine glands release their secretions to a duct of different tissues where they act, such as the internal or external surface of cutaneous tissues, stomach mucose, or pancreatic ducts.