Answer:
fungi
Explanation:
bcuz it is plant-like organism with lack of chlorophyll
I don't know Number 3 so i can't answer.
4. (B) Pulmonary arteries the only artery in the choices that deliver deoxygenated blood.
5. (D) Immunoglobulins are proteins found in blood plasma.
6. (C) Diastolic pressure. I think you meant "relaxes" not "relates"
7. I think the answer is (A) Enzymes. Hormones can also be an answer i think.
Agents that paralyze skeletal muscle by simple competitive inhibition of acetylcholine at muscle receptor sites are called?
a. nondepolarizing
b. depolarizing
c. antagonizing
d. repolarizing
Answer:
a. nondepolarizing
Explanation:
As the nerve impulse arrives, the synaptic end bulbs of the motor neurons release acetylcholine in the synapse. Acetylcholine binds to its receptors present at the motor endplate. This results in the opening of an ion channel in the ACh receptor to allow the movement of the Na+ into the cell. This makes the inside of the muscle fiber more positively charged, that is, depolarized.
Depolarization triggers a muscle action potential. Drugs or chemicals that paralyze skeletal muscle by competitive inhibition of acetylcholine at muscle receptor sites are called non-depolarizing as they do not allow the acetylcholine to facilitate the depolarization of the muscle fiber.
The correct answer is option Covalent bonds.
The water is a molecule formed by the covalent interaction between one oxygen and two hydrogen molecule. The chemical formula of the water is
. In the water molecule, each hydrogen atom shares an electron with the oxygen. The oxygen is more electronegative so, it pulls the electron towards it, and gains a partial negative charge and the hydrogen gains a partial positive charge. The partial positive charge of hydrogen in one molecule attracts the partial negative charge in other molecule and forms inter molecule hydrogen bonding.