Stem cells arise from the inner mass of the cell
Signalling factors trigger differentiation in stem cells
Genes that lead to the production of undifferentiated blood cells are activated
Signalling factors cause undifferentiated blood cells to produce red blood cells
Explanation:
Red blood cells are formed in the bone marrow. The precursor to the RBC is stem cell which is undifferentiated and pluripotent. The stem cell gets differentiated to form immature RBCs. Immature RBC then gets divided and becomes mature. Stem cell giving rise to RBC is called Haemoctytoblast. The process of erythropoiesis takes 2 days to form new red blood cells
Autosomes. The somatic chromosomes are referred to as autosomes.
A whole number ratio; Hopefully that is the answer if you need an actual number the best guess would be 2:1.
Answer:
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Explanation:
"1. Body composition is defined as D. ratio of muscle to fat.
2. Slow-twitch fibers are designed for D. endurance.
3. A by-product of ATP breakdown is D. ADP and phosphorous
4. A tendon is important for muscles. C. It serves as an attachment point to bone
5. Most joints in the body form B. FIRST-CLASS levers.
6. The correct statement concerning good posture is D. Good posture may help to improve balance.
7. The C. Buttocks is considered part of the pelvic girdle?
8. Fitness professionals know that good posture B. is a habit that can be learned and maintained.
9. One of the positive health-related benefits of muscular fitness is D. increased endurance during exercise.
10. The sagittal plane divides the body D. into left and right halves.
11. A normal spine appear on an x-ray B. With natural curves in the neck and lower back
12. Based on the factors of stability, A. Leg curl would be the most unstable lift
13. When you flex your arm, you're performing a/an C. CONCENTRIC contraction.
14. The three body systems that benefit from good posture are B. Digestive, circulatory, and respiratory
15. C. IRON is essential for both bone health and muscle contractions.
16. B. FASCIA is the type of tissue that covers and separates skeletal muscles, providing shape and aiding in function.
17. The most common debilitating disorder among Americans under age 45 is C. tension headaches.
18. Tension headaches usually begin in the D. neck.
19. When you sit with good posture, your spine should be A. very relaxed.
20. A/an C. NEUTRAL spine is one that allows for natural curves and arches.
21. Posture and muscular balance can usually be improved by A. exercising and stretching.
22. D. SYNOVIAL is a freely movable joint?
23. Postural muscles tend to C. WEAKEN if they aren't regularly stimulated to produce adequate force.
24. Aerobic production of ATP comes from D. CARBOHYDRATES during high-intensity training.
25. Standing on your toes is an example of D. Second class lever.
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