Explanation

It is mandatory to wear a safety helmet when rescuing under falling materials.

This protects the rescuer from head injuries caused by falling debris or other hazardous materials.

Explanation

Being careful can help to stay away from accidents.

By being vigilant and attentive to your surroundings, you can avoid many potential hazards. This involves:

• Paying attention to what you're doing.
• Avoiding distractions, especially when performing tasks that require focus, like driving.
• Following safety guidelines and procedures.
• Being aware of your environment and anticipating potential dangers.

Explanation

The muscles that never fatigue are the heart muscle (cardiac muscle)

Cardiac muscle has more mitochondria than skeletal muscle (up to 35% compared to 1-2%), Which makes it resistant to fatigue.

Mitochondria are essential for generating ATP, the cell's energy source.

Other muscles, such as skeletal muscles, can experience fatigue and failure under strenuous conditions.

Explanation

The red blood cell survives on average only 120 days.

Red cells contain a special protein called hemoglobin

RBCs' function is to carry oxygen from the lungs and deliver it throughout the body.

They are made in the bone marrow.

Additional information:

The lifespan of white blood cells is 12-20 days. 

They boost the immune system.

Explanation

• During Anaphase, the contraction of spindle fibers takes place, resulting in the separation of sister chromatids and their movement towards opposite poles of the cell.
• This stage is characterized by the pulling apart of the sister chromatids, ensuring each daughter cell receives a complete set of chromosomes.

Explanation

• Anaerobic respiration is a process of cellular respiration that occurs in the absence of oxygen (O2).
• It is used by small microorganisms like fungi and bacteria, as well as muscle cells during intense exercise.
• Anaerobic respiration produces less energy than aerobic respiration and typically results in the production of lactic acid or ethanol and carbon dioxide.

Explanation

A foliose lichen is a lichen with flat, leaf-like lobes.

They are generally not firmly bonded to the substrate on which they grow.

It is one of the three most common growth forms of lichens.

Explanation

• Frogs are heterotrophic animals that obtain energy by consuming other organisms, such as insects, worms, and even smaller frogs.
• They do not produce their own food like plants (producers) do, and they do not break down dead organisms like decomposers (such as bacteria and fungi) do.
• Therefore, the best description for a frog is a consumer.

Explanation

In carcinoma of the head of the pancreas, the common bile duct causes pain and pressure.

Patients with adenocarcinoma of the pancreas typically present with painless jaundice (70%).

Usually due to obstruction of the common bile duct from the pancreatic head tumor.

Weight loss occurs in about 90% of patients.

Abdominal pain occurs in about 75% of patients.

Explanation

• Lung cancer is a disorder that occurs when cell division in the respiratory tract becomes uncontrolled.
• It leading to the formation of abnormal cells that can cause tumors and cysts.