Answer: Na+ channels are closed
Explanation:
The refractory period describes a period between the initiation of an action potential (where Na+ channels are active/open), and immediately after the action potential’s peak. In the absolute refractory period, action potentials cannot be generated, as Na+ channels are in an inactive or closed state, they usually take around one or two minutes.
After the absolute refractory period the relative refractory period (RRP) occurs. During the RRP, it is hard to send another action potential. Na+ channels are once again open, but the cell remains hyperpolarized- its membrane potential, remains negative. Recovery from inactivation is voltage and time-dependent; Action potentials would require an influx of more positively charged ions. These must be more than a specific threshold in order to have the cells send along more action potentials which helps with figuring out stimulus intensity.
<span>carriers are not eliminated by the disease before passing the defective alleles on to their offspring</span>
Answer:
C: Nitrogen
Explanation:
nitrogen is transparent to infrared light. the molecules are invisible because when you stretch one, it doesn't change the electric field.
Answer:
Interphase is the basic phase of cell cycle.
Explanation:
Interphase is the non-dividing phase. It happens between two successive M phase. Interphase is preparatory phase during which the cell prepares for the next cell division and grows to the same size as their mother cell. This phase is further divided into three sub-phases: i) G1 phase- interval between mitosis. DNA replication begins here. It is the first growth phase, RNA and protein get synthesized. ii) S-phase- Synthesize of DNA takes place and chromosome gets duplicated. iii) G2 phase-
Pre-mitotic phase or the second growth phase. it prepares the cell for the next cell division.
Answer:
True
Explanation:
A thesis statement provides the idea of what the thesis is going to be in about two sentences. The sequence of the statement is simply the introduction of the topic and then the position the author is taking in regards to the topic by providing the supporting points in a similar way as provided in the body. This way the thesis statement does name the supporting points in the same order that they appear as the paragraphs in the body section. Hence, this statement is true as the supporting argument is presented in the same sequence as it is presented in the body section.
