Answer:A. The release of calcium ions causes myosin and actin to attach to each other.
The contraction of skeletal muscles takes place by induction of a nerve impulse, which produces a movement and the interaction of the filaments containing proteins named as actin and myosin. This interaction of filaments is regulated by proteins called tropomyosin and troponin present on the actin filaments. The motor nerve causes the depolarization of the muscle membrane sarcolemma. This triggers the sarcoplasmic reticulum to release calcium ions. This calcium binds to troponin and thus allows the tropomyosine strand on the actin filament to displace so that the part of the actin where myosine head needs to be attached remain uncovered. Binding of the actin myosine filament results in contraction.
Hence, the release of calcium ions causes myosin and actin to attach to each other causes muscle contraction.
Females have two copies of the X chromosome, while males have one X and one Y chromosome. The 22 autosomes are numbered by size. The other two chromosomes, X and Y, are the sex chromosomes. This picture of the human chromosomes lined up in pairs is called a karyotype.
Of the 23 pairs of chromosomes, the first 22 pairs are called "autosomes." The final pair is called the "sex chromosomes." Sex chromosomes determine an individual's sex: females have two X chromosomes (XX), and males have an X and a Y chromosome (XY).
Answer:
The statement by the patient which indicates that further teaching is needed is:
What to do if I am facing side effects of the drugs?
Explanation:
Atopic dermatitis: It is the most common form of Eczema and appears as red itchy rash on cheeks, arms and legs. Mostly children suffer from it. It is a chronic condition and may be associated with Asthma and Hay fever.
Note: There is no definite treatment for it but different agents (drugs) along with precautions can alleviate the symptoms.
Pimecrolimus: It is an immunomodulating agent of calcinuerin inhibitor class used for the treatment of atopic dermatitis.
Monocots only have one cotyledon (vein) dicots have two