Solution : Differences between Ovum (egg) and Sperm cell Ovum (egg) Ovum is the female gamete Bigger in size Spherical in shape Immobile ( non – motile ) No acrosome Contains only X chromosomes Produces in the ovary Sperm cell Sperm is the male gamete Long with tail, head and neck Smaller in size Mobile …
Solution : STRUCTURE OF HUMAN SPERM : A head, neck, middle section, and tail make up sperm. The plasma membrane encloses the entire sperm body. The anterior portion of the head is covered by a cap-like structure known as the acrosome, and the head includes an extended haploid nucleus. This acrosome contains enzymes that aid …
Solution : What is Menstrual Cycle? The uterus expands a new lining each month as a result of the series of changes, making it ready to receive a fertilised egg. The uterus discards its lining if there isn’t a fertilised egg to start a pregnancy. You might refer to the monthly menstrual bleeding that women …
Define Menstrual Cycle. or , What is Menstrual Cycle? Read More »
Solution : Human female reproductive organ The primary and auxiliary sex organs are all part of the female reproductive system. The primary sex organs in females are two ovaries, which also emit female sex hormones including progesterone and oestrogen in addition to producing ova or eggs. The uterus, fallopian tubes, cervix, and vagina are among …
Q. Describe parts , function and importance of human female reproductive organ. Read More »
Female Reproductive System of human The female germ cells or eggs are made in the ovaries. They are also responsible for the production of some hormones. Look at Fig. and identify the various organs in the female reproductive system. When a girl is born, the ovaries already contain thousands of immature eggs. On reaching puberty, …
Solution: The terminal end of a motor nerve and a muscle (skeletal, smooth, or cardiac) form the neuromuscular junction (NMJ), which is a synaptic connection. It is the location where the action potential is sent from the nerve to the muscle.
SOLUTION : Synapse: The connection between a neuron’s axon and dendrite at which two neurons exchange information.Electrical and chemical signals are the primary means of communication between neurons. An action potential is triggered by the stimulation of a nerve cell. This results in the creation of an electrical current that passes through the synaptic cleft …
Q. Where does communication occur between neurons? Read More »
Solution : The heart receives impure blood (deoxygenated blood) from different parts of the body, and it pumps this blood to the lungs. The oxygenated blood or , pure blood from the lungs returns to the heart, which is pumped again into different parts of the body by the heart. Thus, the blood passes twice …
Q. Describe the double circulation of blood in human beings. Why is it necessary? Read More »
SOLUTION : A deficiency of haemoglobin in the human body will cause deficiency disease anaemia. Red blood cells contain haemoglobin, which carries oxygen to the body’s cells. Its quantity must increase in order to maintain the blood’s ability to carry oxygen. The person may suffer from breathlessness, Headache, insomnia, fatigue etc. which may be a …
Q. What would be the consequences of a deficiency of haemoglobin in our bodies? Read More »
