Kuiz Sains Tambahan Tingkatan 5 Bab 1 Set 1

SELAMAT DATANG Kuiz Sains Tambahan Tingkatan 5 Bab 1 Set 1

Penyenggaraan Dan Kesinambungan Hidup (English)

KUIZ INI MENGANDUNGI 10 SOALAN

The human skeleton is divided into two main parts. Which of the following bones belongs to the axial skeleton?

Sternum

Femur

Scapula

Radius

None

What is the unique feature of the first cervical vertebra, known as the atlas, that allows for the nodding motion of the head?

It articulates with the skull and lacks a centrum.

It has a large, thick centrum to support the skull.

It has a long, downward-pointing spinous process.

It has a prominent odontoid process.

None

Which type of neuron is responsible for transmitting nerve impulses from the central nervous system to an effector like a muscle or gland?

Afferent neuron

Interneuron

Sensory neuron

Efferent neuron

None

What is the primary function of the myelin sheath that surrounds some axons?

To act as an insulator and speed up impulse transmission.

To provide structural support to the cell body.

To receive chemical signals from other neurons

To synthesize neurotransmitters for the neuron.

None

Which of the following best describes the cause of Alzheimer's disease as mentioned in the source material?

A genetic disorder affecting the myelin sheath, leading to muscle weakness

Shrinkage of brain tissue and reduced secretion of the neurotransmitter acetylcholine.

A progressive disorder caused by a lack of the neurotransmitter dopamine.

The formation of blood clots in the brain, leading to memory loss.

None

During hemodialysis, how are waste products like urea removed from the patient's blood?

They are filtered out using a high-pressure system similar to the glomerulus.

They diffuse from the blood into the dialysis fluid down a concentration gradient.

They are chemically broken down by enzymes present in the dialysis fluid.

They are actively transported out of the blood by the dialysis machine.

None

The functional unit of the kidney responsible for forming urine is the nephron. Which part of the nephron is primarily responsible for the selective reabsorption of glucose and amino acids?

Glomerulus

Proximal convoluted tubule

Collecting duct

Loop of Henle

None

Which of the following correctly describes a symptom and cause of osteoporosis?

Symptom: Progressive muscle weakening; Cause: A mutant gene on the X chromosome.

Symptom: Inability of blood to clot; Cause: Lack of clotting factors.

Symptom: Joint inflammation; Cause: Uric acid crystal buildup.

Symptom: Porous, brittle bones; Cause: Lack of calcium and Vitamin D.

None

Which condition is characterized by the formation of a blood clot inside a blood vessel, obstructing the flow of blood?

Anemia

Hemophilia

Artritis

Thrombosis

None

10.

In the mechanism of blood clotting, what is the immediate role of thrombokinase?

It directly forms a plug at the site of the wound.

It converts fibrinogen into a mesh of fibrin.

It causes platelets to break down and release their contents

It converts prothrombin into thrombin in the presence of calcium ions.

None

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